North
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-09-22 19:00 | 27.9 | 35.2 | 0.8 | 454.4 | 8.1 | 3.5 |
| 2021-09-22 18:00 | 14.8 | 51.5 | 0.6 | 445.5 | 7.3 | 4.4 |
| 2021-09-22 17:00 | 16.9 | 50.4 | 0.4 | 382.7 | 9.0 | 2.4 |
| 2021-09-22 16:00 | 17.7 | 46.6 | 0.4 | 429.3 | 9.9 | 3.7 |
| 2021-09-22 15:00 | 19.7 | 39.9 | 0.6 | 403.4 | 8.2 | 3.9 |
| 2021-09-22 14:00 | 12.3 | 53.0 | 0.5 | 387.3 | 5.9 | 1.3 |
| 2021-09-22 13:00 | 10.1 | 54.7 | 0.6 | 373.1 | 4.0 | 1.1 |
| 2021-09-22 12:00 | 17.6 | 45.8 | 0.9 | 625.1 | 3.5 | 1.3 |
| 2021-09-22 11:00 | 17.9 | 35.2 | 1.1 | 533.5 | 5.2 | 2.0 |
| 2021-09-22 10:00 | 16.1 | 29.0 | 1.1 | 566.8 | 10.8 | 3.1 |
| 2021-09-22 09:00 | 22.1 | 20.7 | 1.2 | 471.9 | 15.4 | 6.8 |
| 2021-09-22 08:00 | 29.0 | 4.4 | 2.1 | 781.0 | 17.6 | 9.6 |
| 2021-09-22 07:00 | 22.2 | 2.6 | 1.6 | 725.0 | 20.9 | 14.2 |
| 2021-09-22 06:00 | 22.7 | 2.0 | 1.3 | 724.9 | 23.2 | 14.9 |
| 2021-09-22 05:00 | 27.4 | 2.1 | 1.3 | 744.8 | 24.2 | 12.1 |
| 2021-09-22 04:00 | 29.1 | 2.0 | 1.7 | 871.0 | 22.8 | 12.0 |
| 2021-09-22 03:00 | 34.2 | 2.2 | 1.8 | 906.8 | 22.1 | 10.0 |
| 2021-09-22 02:00 | 43.2 | 2.0 | 1.6 | 992.4 | 27.1 | 11.3 |
| 2021-09-22 01:00 | 45.3 | 2.1 | 1.5 | 1,015.5 | 28.3 | 15.9 |
| 2021-09-22 00:00 | 48.9 | 2.4 | 2.5 | 1,153.0 | 25.2 | 19.4 |
| 2021-09-21 23:00 | 53.1 | 2.3 | 3.2 | 1,151.7 | 24.5 | 19.4 |
| 2021-09-21 22:00 | 57.5 | 2.9 | 2.8 | 1,301.1 | 21.1 | 14.5 |
| 2021-09-21 21:00 | 49.1 | 5.3 | 2.4 | 982.2 | 18.4 | 12.4 |
| 2021-09-21 20:00 | 50.5 | 5.4 | 2.0 | 777.5 | 15.5 | 12.5 |
Remarks:
(1) Time shown is in Hong Kong time.
(2) NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates
(3) Concentration shown is in µg/m3.
(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.
